This adds support for the internal switch found in GE HealthcareB450v3, B650v3 and B850v3. All devices use a GPIO bitbanged MDIObus to communicate with the switch and a PCIe based network cardfor exchanging network data. The cpu network data link requires,that the switch's internal phy interface is enabled, so supportfor that is added by the first patch in this series.

The patch series is based on v4.15-rc8.

Changes since PATCHv1: * Use 'marvell,mv88e6085' instead of introducing compatible string for mv88e6240. * Fix indention of DT nodes * Only enable 'cpu' phy, if explicitly set to "internal".